H3C Technologies H3C MSR 50 - Manual (Page 139)

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Figure 3-39 120-ohm 4E1 conversion cable
HU AW EI HU AW EI HU AW EI HU AW EI
DB25公
DB15母
Figure 3-40 75-ohm 4E1 conversion cable
Both 75-ohm 4E1 and 120-ohm 4E1 conversion cables are required for MIM-4E1/4E1-F modules.
While E1 cable is optional, please order E1 cables when purchasing an MIM-4E1 or MIM-4E1-F module.
By default, they are not provided.
In addition, a 75-ohm to 120-ohm adapter is provided. For the pinouts of cables, see Low-End and
Mid-Range Series Routers Cable Manual .